Waxhaw pairs a small, historic downtown with some of the fastest new-home growth in the county, especially in the neighborhoods spreading out toward the South Carolina line.
Older homes near downtown Waxhaw and the surrounding rural lots are more likely to be on private wells, where hardness and iron are common, while the newer subdivisions are typically tied into municipal or community water systems.
That mix of well and municipal water within the same town is exactly why hardness (the grime and scale you see in showers) and odor (chlorine or sulfur) don't always travel together in Waxhaw — which is why some homes need Soft Water, some need Clean Water, and some need Complete Home to cover both.
Monroe is the Union County seat, with a mix of older homes near downtown on the city's municipal water system and newer construction further out toward the edges of town.
Matthews sits right on the Union/Mecklenburg county line and has a wide mix of housing stock, from established older neighborhoods to newer builds closer to the Charlotte commute corridor.